How do I shrink a cotton sweater?

#1

I have a cotton sweater made from Schaffer handpainted yarn. One, Ive lost weight. Two, it seems to be growing of its own accord. Any ideas on how to shrink it?

#2

Did you try washing it and putting it in the dryer? Cotton grows while wearing it, but drying will at least put it back to its knit size, sometimes shrink it a little.